Selves and philip f



UNITED STATES PATENT OFFICE.

ARCHIBALD PUTNAM AND JAS. H. PUTNAM, OF YVELLSVILLE, OHIO, ASSIGNORS T0THEM- SELVES AND PHILIP F. GEISSE, OF SAME PLACE.

RAILROAD TURN-TABLE.

Specification of Letters Patent No. 24,522, dated June 21, 1859.

To all whom it may concern:

Be it known that we, ARCHIBALD PUTNAM andJAMEs H. PUTNAM, both of`Nellsville, Columbiana county, Ohio, have invented a certain new anduseful Improvement in Railroad Turn-Tables; and we hereby d-e- Clare thefollowing to be a full and exact description of the same, referencebeing had to the annexed drawings, making part of this specification.

Our invent-ion consists in an application of adjustable spindle tocomp-ensate for wear and equalize the bearings of the table. v

In the accompanying drawings Figure l represents' a perspective view ofour improved turn table. Fig. 2 is a side elevation of the same. Fig. 3is a vertical transverse section at .fr x Fig. 2.

A A represent trucks mounted on wheels B and supporting the ends ofstring' pieces C.

D are base ties ruiming nearly the length of the table and connected to,the string pieces C by brace rods F passing through the base ties D andstring piec-es C, and secured by nuts a, a.

7L, it, are diagonal braces extending between the strings C and baseties upon a similar principle to the truss framing o a bridge.

J, J, are tension cords for the purpose of giving additional strength tothat part of the table between the bearings. Secured centrally of thetable between the string pieces C and base ties D is a cross beam E.This cross beam is of the same length as the table, and is set at rightangles thereto and supported at each end on trucks Cr, G, mounted onwheels b, b. One object of this beam, is to relieve the spindle fromsome of the weight which would otherwise come upon it; another object isto prevent the table from careening from unequal weight on either sidethereby straining the spindle or throwing it out of its proper bearing.

H H, are stay rods connecting the ends ot the cross beam to the capplate 0.

d al, are sleepers secured transversely upon the string pieces C.

K K are the rails attached to the sleepers in the usual manner.

e in Fig. 3 is a nut fitted centrally in the cross beam E with flange fattached to its lower end; when the said nut is in place this flange isbrought in contact with the underside of the cross beam and sustainsthat portion of the weight upon the screw thread of the spindle.

g is the spindle upon the upper part oi which is cut a screw threadwhich tits into the nut e, by means of which the spindle is adjusted tocompensate for the'wear of that end working in the step i, and also toadjust the level or the table to correspond with that of the track.

L is an annular track upon which the truck wheels run when the table isrevolved.

In the ordinary railroad turn table the weakest point is usually betweenthe central and outward bearings, because there being no bearing there,there is nothing to sustain the weight at that point, consequently thetable and track with it sag and thereby strain the spindle, whereas byour arrangement of braces it will be seen any undue strain at this pointis diagonally transferred to the outward or central bearings, so thatthe table cannot sag. Should the weight be unequally divided upon thetwo tracks or in other words more on one side than the other it isprevented from careening as before stated by the cross beam E.

Tables constructed upon this plan can be easily taken apart fortransportation.

Al/Ve claim as new and of our invention- The adjustable spring g appliedand adapted in the manner and for the purpose set forth.

In testimony of which invention, we hereunto setour hands.

A. PUTNAM.

J. H. PUTNAM. Witnesses:

GUY C. HUMPI-Innis, ANDREW Foco.

